The CBI on Wednesday filed its supplementary chargesheet in the Saradha scam accusing West Bengal minister Madan Mitra, former Trinamool Congress MP Srinjoy Bose and suspended party MP Kunal Ghosh of cheating even as it shifts its focus to the role of regulatory bodies.

West Bengal Transport Minister Madan Mitra, behind bars in connection with the multi-crore rupee Saradha scam, has not been cooperating in the investigations, the CBI Friday told a city court during the Trinamool Congress leader`s appearance.

Trinamool Congress general secretary Mukul Roy was on Friday questioned for nearly five hours by the CBI in connection with the Saradha chit fund scam and later said he wanted the truth to come out and that justice should reach the poor who kept their money in the company.

Rejecting her allegation that the Centre was pursuing a "selective vendetta" against TMC, Union minister M Venkaiah Naidu on Monday said that by making such claims, West Bengal Chief Minister Mamata Banerjee was "helping" those who are involved in criminal cases.

Union Finance Minister Arun Jaitley Sunday attacked at West Bengal Chief Minister Mamata Banerjee for her reactions to arrest of her Trinamool Congress's leaders in the Saradha chit fund scam and on her statements in the Burdwan blast case. The Trinamool hit back, seeking to know the source of BJP's massive funds spent during the elections.

As regulator Securities and Exchange Board of India​ (SEBI) continues its clampdown on ponzi schemes, it has found Odisha to be a major hotbed for such illegal fund-raising activities with investors being duped in name of jatropha bushes and gold investments.

The Special Crime Branch of Central Bureau of Investigation (CBI), which started probing the Saradha multi-crore rupees ponzi scheme scam four months ago, would file the first chargesheet by October end.

Welcoming the Supreme Court order directing CBI to probe the multi-crore Saradha chit fund scam, the Congress on Friday described it as a "personal political defeat" of Trinamool Congress supremo Mamata Banerjee while the BJP said that the TMC stood "badly exposed".

Attacking Trinamool Congress for opposing CBI investigation into Saradha scam, Left parties welcomed the Supreme Court directions for such a probe and demanded that the agency should uncover the "political nexus" behind the swindling of funds and associated money laundering.